Vaillant auroTHERM VFK 145 H Installation Manual page 9

4.1.1.3 Transporting collectors
1. To protect the collectors against damage, always trans-
port them horizontally.
2. Transport the collectors to the roof using suitable aids.
4.1.2 Complying with clearances and installation
clearances
In order to fit the collectors correctly, the specified clear-
ances and installation clearances must be observed.
▶
For the necessary edge clearances, see chapter "Defin-
ing edge clearances of the roof brackets".
4.1.3 Selecting suitable connection
▶ Select the appropriate connection for the collectors.
▶
For the hydraulic connection of the collectors, select one
of the four variants shown in the illustration.
▶ Ensure that the solar fluid always flows through the col-
lectors from the bottom to the top.
Conditions: Number of collectors: 1 ... 5
1 ...
▶
Configure the hydraulic connections on top of each other
on one side.
Conditions: Number of collectors: 6 ... 12
1 2
▶ To guarantee a complete flow through the collector field,
arrange the hydraulic connections diagonally.
0020100571_03 auroTHERM, auroTHERM plus Installation manual
4 5
...
12
11
On-roof fitting and installation 4
Conditions: Number of collectors: ≥ 13
1 2
8 9
▶ Always connect as many collectors as possible in series.
▶ Set up several parallel connector rows.
▶ Connect the collector rows hydraulically in parallel.
▶ To avoid pressure losses in the sub-collector fields, only
use parallel connection for collector rows with the same
number of collectors.
▶ Ensure that each sub-collector field has the same total
pipe length in the flow and return (Tichelmann system), in
order to avoid pressure losses in the connection pipes.
4.1.4 Preparing the roof duct
Caution.
Building damage due to penetrating wa-
ter.
If the roof duct is not prepared properly, water
may penetrate the building interior.
▶ Ensure that the roof duct is prepared prop-
erly.
1. Make a v-shaped cut in the roofing felt membrane.
2. Fold the upper, wider flap onto the roof batten above,
and fold the lower, narrower flap onto the roof batten
below.
3. Fix the roofing felt membrane tight to the roof batten, so
that any moisture runs off to the side.
...
7
6
...
14
13
9